CN107946782B - Terminal-equipped electric wire, method for manufacturing terminal-equipped electric wire, and terminal crimping device - Google Patents

Terminal-equipped electric wire, method for manufacturing terminal-equipped electric wire, and terminal crimping device Download PDF

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Publication number
CN107946782B
CN107946782B CN201710943302.6A CN201710943302A CN107946782B CN 107946782 B CN107946782 B CN 107946782B CN 201710943302 A CN201710943302 A CN 201710943302A CN 107946782 B CN107946782 B CN 107946782B
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China
Prior art keywords
wire
terminal
core wire
mold
connecting portion
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CN201710943302.6A
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CN107946782A (en
Inventor
斋藤荣辉
岩泽英彦
高柳政祥
佐藤庆
篠原准弥
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Yazaki Corp
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Yazaki Corp
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Priority claimed from JP2017135454A external-priority patent/JP6546627B2/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/10—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation
    • H01R4/18—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/005—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for making dustproof, splashproof, drip-proof, waterproof, or flameproof connection, coupling, or casing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/46—Bases; Cases
    • H01R13/52—Dustproof, splashproof, drip-proof, waterproof, or flameproof cases
    • H01R13/5216—Dustproof, splashproof, drip-proof, waterproof, or flameproof cases characterised by the sealing material, e.g. gels or resins
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/10—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation
    • H01R4/18—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping
    • H01R4/183—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping for cylindrical elongated bodies, e.g. cables having circular cross-section
    • H01R4/184—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping for cylindrical elongated bodies, e.g. cables having circular cross-section comprising a U-shaped wire-receiving portion
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/10—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation
    • H01R4/18—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping
    • H01R4/183—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping for cylindrical elongated bodies, e.g. cables having circular cross-section
    • H01R4/184—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping for cylindrical elongated bodies, e.g. cables having circular cross-section comprising a U-shaped wire-receiving portion
    • H01R4/185—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping for cylindrical elongated bodies, e.g. cables having circular cross-section comprising a U-shaped wire-receiving portion combined with a U-shaped insulation-receiving portion
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/58—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation characterised by the form or material of the contacting members
    • H01R4/62—Connections between conductors of different materials; Connections between or with aluminium or steel-core aluminium conductors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/70—Insulation of connections
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/04—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for forming connections by deformation, e.g. crimping tool
    • H01R43/048—Crimping apparatus or processes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/04—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for forming connections by deformation, e.g. crimping tool
    • H01R43/048—Crimping apparatus or processes
    • H01R43/0488—Crimping apparatus or processes with crimp height adjusting means
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/04—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for forming connections by deformation, e.g. crimping tool
    • H01R43/048—Crimping apparatus or processes
    • H01R43/055—Crimping apparatus or processes with contact member feeding mechanism
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/04—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for forming connections by deformation, e.g. crimping tool
    • H01R43/058—Crimping mandrels
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/46—Bases; Cases
    • H01R13/52—Dustproof, splashproof, drip-proof, waterproof, or flameproof cases

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)
  • Manufacturing Of Electrical Connectors (AREA)

Abstract

Provided are a terminal-equipped wire, a method for manufacturing the terminal-equipped wire, and a terminal crimping device, wherein performance degradation can be suppressed. A terminal-equipped electric wire (2) is provided with: an electric wire (50); a crimp terminal (1) having a wire connection section (12) that is wound around and crimped with respect to a core wire (51) and a sheath (52) of a wire (50), wherein an end section on the distal end side of the core wire (51) of the wire connection section (12) has an expanded diameter section (12D) that covers the distal end section of the core wire and accommodates a waterproof member (20) that seals the gap between the core wire and the wire connection section, and the cross-sectional area of the expanded diameter section (12D) is larger than the cross-sectional area of a section (12E) on the proximal end side of the core wire (51) than the expanded diameter section (12D).

Description

Terminal-equipped electric wire, method for manufacturing terminal-equipped electric wire, and terminal crimping device
Technical Field
The present invention relates to a terminal-equipped electric wire, a method for manufacturing the terminal-equipped electric wire, and a terminal crimping device.
Background
Conventionally, there are a crimp terminal crimped with a core wire of an electric wire and a terminal crimping device for crimping the crimp terminal to the electric wire. As an example of the crimp terminal, patent document 1 discloses a technique of crimping a terminal as follows: the crimp terminal includes barrel pieces constituting a crimp portion on both sides in a width direction, the crimp portion crimping an exposed portion of a sheathed wire, which is a sheathed wire in which an outer periphery of the wire conductor is sheathed with an insulating sheath body, the exposed portion being exposed by a predetermined length than a distal end of the sheath body, the barrel pieces being formed to be longer than the length of the exposed portion of the wire conductor in a longitudinal direction, a waterproof unit being included in at least a part of a surface of the crimp portion, the barrel pieces for the crimp portion being crimped so as to continuously and integrally surround from a distal end side of the distal end of the wire conductor to a rear end side of the distal end of the sheath body.
Patent document 2 discloses a technique of the following terminal-equipped electric wire: the pressure-bonding section is provided with: a sheath crimping part for crimping the sheath part of the sheath wire; a wire crimping part for crimping the wire exposed from the sheath part; the seal portion on the terminal main body side compared with the wire crimping portion has a higher compression height than the wire crimping portion.
Documents of the prior art
Patent document
Patent document 1: WO2011/122622
Patent document 2: japanese laid-open patent publication No. 2017-84485
Disclosure of Invention
Problems to be solved by the invention
Here, there is room for further improvement in terms of suppressing the performance degradation of the terminal-equipped electric wire. For example, when the core wire of the electric wire or the waterproof member is exposed from the crimp terminal to the outside by the pressure at the time of crimping, there is a possibility that the electric performance and the sealing property are deteriorated. In a crimp terminal having a waterproof member, if the exposed waterproof member is attached to a mold, the sealing property is likely to be lowered. Alternatively, if the extension amount of the crimp terminal at the time of crimping is large, the performance of the electric wire with the terminal may vary.
The invention aims to provide a wire with a terminal, a method for manufacturing the wire with the terminal and a terminal crimping device, wherein the performance reduction can be restrained.
Means for solving the problems
The electric wire with terminal of the present invention is characterized by comprising: an electric wire; and a crimp terminal having a wire connection portion wound around and crimped with a core wire and a sheath of the wire, wherein the wire connection portion has a diameter-enlarged portion at an end portion on a distal end side of the core wire, the diameter-enlarged portion covering a distal end portion of the core wire and accommodating a waterproof member sealing a gap between the core wire and the wire connection portion, and a cross-sectional area of the diameter-enlarged portion is larger than a cross-sectional area of a portion closer to a proximal end side of the core wire than the diameter-enlarged portion.
ADVANTAGEOUS EFFECTS OF INVENTION
The electric wire with terminal according to the present invention includes: an electric wire; a crimp terminal having a wire connecting portion wound and crimped with respect to a core wire and a sheath of an electric wire. The wire connecting portion has a distal end portion covering the core wire, and an enlarged diameter portion accommodating a waterproof member sealing a gap between the core wire and the wire connecting portion, the enlarged diameter portion having a cross-sectional area larger than a cross-sectional area of a portion closer to the base end side of the core wire than the enlarged diameter portion. According to the electric wire with a terminal of the present invention, the extension amount of the electric wire connecting portion is reduced by providing the diameter-enlarged portion. Since the amount of extension of the wire connecting portion is reduced, variation in the length dimension is suppressed, and the performance of the terminal-equipped wire is suppressed from being degraded.
Drawings
Fig. 1 is a perspective view showing a state before crimping of a crimp terminal according to an embodiment.
Fig. 2 is a side view showing a state before crimping of the crimp terminal according to the embodiment.
Fig. 3 is a perspective view showing the crimp terminal according to the embodiment after crimping.
Fig. 4 is a side view showing the crimp terminal according to the embodiment after crimping.
Fig. 5 is a perspective view showing a state before bending processing of the wire connecting portion is performed in the crimp terminal according to the embodiment.
Fig. 6 is a plan view showing a state in which a waterproof member is attached to the crimp terminal according to the embodiment.
Fig. 7 is a plan view illustrating a terminal interlock body of an embodiment.
Fig. 8 is a side view of the terminal crimping device according to the embodiment.
Fig. 9 is a front view of the terminal crimping device according to the embodiment.
Fig. 10 is a perspective view showing the first and second molds according to the embodiment.
Fig. 11 is a side view showing a terminal cutting body according to the embodiment.
Fig. 12 is a rear view showing a terminal cutting body according to the embodiment.
Fig. 13 is a sectional view showing a state where the electric wire and the crimp terminal are placed in the terminal crimping device of the embodiment.
Fig. 14 is a front view showing a second mold according to the embodiment.
Fig. 15 is a sectional view of a second mold according to the embodiment.
Fig. 16 is a perspective view showing the crimped wire connection section according to the embodiment.
Fig. 17 is a longitudinal sectional view of the crimped wire connection section according to the embodiment.
Fig. 18 is a transverse cross-sectional view of the crimped wire connection section according to the embodiment.
Fig. 19 is a diagram illustrating an end of the wire connection section after crimping according to the embodiment.
Fig. 20 is a longitudinal sectional view of the crimped wire connection section according to the comparative example.
Fig. 21 is a diagram showing an end of the wire connection section after crimping according to the comparative example.
Fig. 22 is a front view of a second mold according to example 2 of the embodiment.
Fig. 23 is a perspective view of a second mold according to embodiment 2.
Fig. 24 is a sectional view of a second mold according to example 2 of the embodiment.
Fig. 25 is a perspective view of a first mold according to embodiment 2.
Fig. 26 is a perspective view of the terminal-equipped wire according to embodiment 2 of the present invention.
Fig. 27 is a cross-sectional view of the terminal-equipped electric wire according to embodiment 2 of the present invention.
Fig. 28 is another cross-sectional view of the terminal-equipped electric wire according to embodiment 2 of the present invention.
Fig. 29 is a front view of a second mold according to modification 1 of the embodiment.
Fig. 30 is a sectional view of a second mold according to modification 1 of the embodiment.
Fig. 31 is a diagram illustrating an operation at the time of pressure bonding.
Description of reference numerals
1: crimping terminal
2: electric wire with terminal
10: terminal fitting
11: terminal connection part
12: electric wire connecting part
12A: core wire crimping part
12B: skin-covered crimping part
12C: connecting and crimping part
12D: expanding part
12D1: corner part
12D2: side wall part
12E: part on the base end side
12F: flat part
12F1: outer side surface
12G: tapered portion
12H: connecting part
12J: inclined part
13: connecting part
13 a: side wall
14: bottom (bottom wall)
15: first barrel part (first riveting sheet)
16: second cylinder part (second riveting sheet)
17: region of serration
20: waterproof member
21: the first waterproof part
22: second waterproof part
23: third waterproof part
30: terminal interlocking body
31: connecting sheet
31 a: terminal transfer hole
32: connecting part
50: electric wire
51: core wire
51 a: end tip
52: coating leather
100: terminal crimping device
101: terminal supply device
102: crimping device
103: drive device
110: crimping machine
111: frame structure
112: first mold
112 a: upper surface edge
112A: first anvil
112A1: concave surface
112B: second anvil
112B1: concave surface
112C: protrusion
113: second mold
113A: first compressor
113A1: concave part
113B: second rolling machine
113B1: concave part
113C: expanding part
113D: part on the base end side
114: power transmission mechanism
115: the first wall surface
116: second wall surface
115a, 116 a: bending part
115b, 116 b: one end of
115c, 116 c: the other end of the tube
117: third wall surface
117A: step part
117A1: plane part
117A2: first bending part
117A3: second bending part
117B: connecting part
117C: inclined part
117D: connecting part
118: electric wire pressing piece
120: terminal cutting mechanism
121: terminal cutting body
122: push-down member
123: elastic component
L first direction
W: second direction
H: third direction
H1, H3: height of terminal
H2: spacer
Detailed Description
Hereinafter, a terminal-equipped wire, a method for manufacturing the terminal-equipped wire, and a terminal crimping device according to embodiments of the present invention will be described in detail with reference to the drawings. The present invention is not limited to the present embodiment. The components of the embodiments described below include components that can be easily conceived by those skilled in the art or substantially the same components.
[ embodiment ]
Referring to fig. 1 to 21, an embodiment will be explained. The present embodiment relates to a terminal-equipped wire, a method for manufacturing a terminal-equipped wire, and a terminal crimping device. In addition, FIG. 13 shows a section XIII-XIII in FIG. 9. Figure 15 shows the XV-XV cross-section of figure 14. Figure 18 shows a cross-section XVIII-XVIII of figure 17.
First, the crimp terminal 1 according to the present embodiment will be described. A crimp terminal 1 shown in fig. 1 and the like is a terminal crimped to an electric wire 50. The crimp terminal 1 is electrically connected to a counterpart terminal (not shown) in an integrated state with the electric wire 50. The end portion of the electric wire 50 to be crimped is stripped of the sheath 52, and the core wire 51 is exposed to a predetermined length. The core wire 51 may be an aggregate of a plurality of wire members or may be a single wire such as a coaxial cable. The crimp terminal 1 is crimped to an end of the electric wire 50, and is electrically connected to the exposed core wire 51.
The crimp terminal 1 has a terminal fitting 10 and a waterproof member 20. The terminal fitting 10 is a main body portion of the crimp terminal 1. The terminal fitting 10 is formed of a conductive metal plate (e.g., a copper plate or a copper alloy plate) as a base material. The terminal fitting 10 is formed into a predetermined shape that can be connected to a mating terminal or the electric wire 50 by press working, bending working, or the like of the base material. The terminal fitting 10 has a terminal connecting portion 11 and an electric wire connecting portion 12. The terminal connecting portion 11 is a portion electrically connected to a counterpart terminal. The wire connection portion 12 is a portion to be crimped with the wire 50 and is electrically connected to the core wire 51. A connecting portion 13 is provided between the terminal connecting portion 11 and the wire connecting portion 12. In other words, the terminal connection portion 11 and the wire connection portion 12 are connected via the connection portion 13. The coupling portion 13 has: side walls 11a, 11a of the terminal connecting portion 11; and side walls 13a, 13a connected to the side walls of the wire connecting portion 12, i.e., the barrel piece portions 15, 16. One side wall 13a connects one side wall 11a to the first barrel portion 15 and the other side wall 13a connects the other side wall 11a to the second barrel portion 16. The height of the side wall 13a is lower than the height of the barrel piece portions 15 and 16 and the side wall 11 a. More specifically, the height of the side wall 13a becomes lower from the terminal connecting portion 11 toward the wire connecting portion 12.
The terminal fitting 10 may be a male terminal or a female terminal. The terminal connecting portion 11 is formed in a male type in a case where the terminal fitting 10 is a male terminal, and in a female type in a case where the terminal fitting 10 is a female terminal.
In the explanation of the crimp terminal 1, a connection direction with a counterpart terminal, that is, an insertion direction with the counterpart terminal is referred to as a first direction L, the first direction L is a longitudinal direction of the crimp terminal 1, a parallel arrangement direction of the crimp terminal 1 is referred to as a second direction W, the parallel arrangement direction is a direction in which the crimp terminals 1 are arranged in parallel in the terminal interlock body 30 as described later and is a width direction of the crimp terminal 1, a direction perpendicular to both the first direction L and the second direction W in the crimp terminal 1 is referred to as a third direction H, and the third direction H is a height direction of the crimp terminal 1.
In the molding step, the crimp terminal 1 is molded into a flat plate shape, and from this state, in the terminal connecting portion molding step, the terminal connecting portion 11 is formed into a cylindrical shape as shown in fig. 1. In the terminal connection portion forming step, the terminal connection portion 11 is subjected to bending processing or the like. The terminal connecting portion 11 of the present embodiment is formed in a cylindrical shape having a rectangular cross-sectional shape. The electric wire connecting portion 12 is formed in a U-shaped cross-sectional shape in the electric wire connecting portion forming process. In the wire connection portion forming step, the wire connection portion 12 is subjected to bending processing or the like. In the bonding step, the waterproof member 20 is bonded to the wire connecting portion 12. The adhering step may be performed before the wire connecting portion forming step or may be performed after the wire connecting portion forming step.
As shown in fig. 1 and 6, the electric wire connecting portion 12 has a bottom portion 14, a first barrel portion 15, and a second barrel portion 16. The bottom 14 is a portion that becomes the bottom wall of the U-shaped electric wire connection portion 12. The end of the electric wire 50 is placed on the bottom portion 14 during crimping. The first barrel part 15 and the second barrel part 16 are portions to be side walls of the wire connecting part 12 formed in a U shape. The first barrel part 15 and the second barrel part 16 are connected to the ends of the bottom 14 in the second direction W. The first barrel portion 15 and the second barrel portion 16 protrude from the end portions of the bottom portion 14 in the width direction in a direction intersecting the width direction. In the wire connection portion 12 formed in the U shape, when the end portion of the wire 50 is placed on the bottom portion 14, the first barrel portion 15 and the second barrel portion 16 surround the wire 50 from both sides in the second direction W.
The lengths of the first barrel portion 15 and the second barrel portion 16 from the root portion on the bottom portion 14 side to the end surfaces of the distal ends 15a and 16a may be equal to each other, or one of the lengths may be longer than the other. In the crimp terminal 1 of the present embodiment, the length from the root to the tip 16a of the second barrel portion 16 is longer than the length from the root to the tip 15a of the first barrel portion 15.
The first barrel part 15 and the second barrel part 16 are wound around the electric wire 50 while being overlapped with each other, for example. In the present embodiment, the second barrel portion 16 is overlapped outside the first barrel portion 15. Further, the first barrel portion 15 and the second barrel portion 16 may be subjected to caulking called B-crimping. The B-curl is formed by bending the first barrel part 15 and the second barrel part 16 toward the bottom part 14, and crimping the ends 15a and 16a so as to press the electric wire 50. Since the crimp terminal 1 of the present embodiment is provided with the waterproof member 20 described later, the former caulking process is adopted.
The end of the wire 50 is inserted into the space inside the U-shape from the opening of the U-shape of the wire connection portion 12, i.e., the gap between the ends 15a and 16 a. The electric wire connection portion 12 is formed to be easily inserted into an end portion of the electric wire 50. Specifically, the wire connection portion 12 widens the interval between the first barrel portion 15 and the second barrel portion 16 in the second direction W as it goes from the bottom portion 14 side toward the end faces of the distal ends 15a, 16 a.
As shown in fig. 2 to 6, the first barrel piece portion 15 and the second barrel piece portion 16 have a joint crimp portion 12C between the core crimp portion 12A and the sheath crimp portion 12B, and the first barrel piece portion 15 and the second barrel piece portion 16 are one piece portions each of which is continuous in this order along the first direction L in each of the crimp portions 12A, 12C, 12B.
The core wire crimping part 12A is a part crimped with the core wire 51 of the tip of the electric wire 50. The core wire pressure-bonding section 12A is a portion of each of the tube piece sections 15 and 16 closest to the connection section 13. The sheath pressure-bonding section 12B is a section to be pressure-bonded to the end of the sheath 52. The skin pressure-bonding section 12B is a portion of each of the cylindrical sheet sections 15 and 16 located farthest from the connecting section 13.
The connecting crimping part 12C is a part connecting the core wire crimping part 12A and the sheath crimping part 12B. The pressure-bonding section 12C is connected to a boundary portion between the core wire 51 and the sheath 52 of the electric wire 50.
The wire connecting portion 12 integrally covers the core wire 51 and the sheath 52 by pressure contact with the electric wire 50.
As shown in fig. 5 and 6, a serration region 17 is provided on an inner wall surface of the wire connection part 12, that is, a wall surface covering the wire 50 side, the serration region 17 is a core wire holding region holding the core wire 51, the serration region 17 is a region including a portion wound around the core wire 51 on the inner wall surface of the wire connection part 12, a plurality of concave portions, a plurality of convex portions, or a combination of concave portions and convex portions are arranged in the serration region 17, the concave portions and the convex portions increase a contact area between the wire connection part 12 and the core wire 51, and the adhesion strength between the both is improved, the serration region 17 of the present embodiment is a rectangular region, and a plurality of concave portions 17a are formed at mutually different positions in the first direction L.
Here, it is not desirable that water intrudes between the core wire 51 and the wire connecting portion 12 crimped to the core wire 51. For example, if the metal material of the core wire 51 and the metal material of the wire connection portion 12 have different ionization tendencies, there is a possibility of corrosion. As an example, in the case where the material of the core wire 51 is aluminum and the material of the wire connecting portion 12 is copper, there is a possibility that the core wire 51 corrodes. The crimp terminal 1 of the present embodiment is provided with a waterproof member 20.
The waterproof member 20 inhibits water from entering between the wire connecting portion 12 and the core wire 51.
The waterproof member 20 is a sheet-shaped member formed mainly of an adhesive such as an acrylic adhesive. The waterproof member 20 of the present embodiment is a member having an adhesive effect on both surfaces, and is formed of an adhesive sheet in which an adhesive is impregnated into a sheet-shaped nonwoven fabric.
The waterproof member 20 is attached to, for example, an inner wall surface of the flat plate-shaped wire connection portion 12 shown in fig. 5, the waterproof member 20 is formed into a predetermined shape, and has a first waterproof portion 21, a second waterproof portion 22, and a third waterproof portion 23, as shown in fig. 6, the first waterproof portion 21 is configured to waterproof a portion where the first barrel portion 15 and the second barrel portion 16 overlap each other after completion of the press-contact, that is, the first waterproof portion 21 is sandwiched between the first barrel portion 15 and the second barrel portion 16 overlapping each other, and a waterproof region is formed between the barrel portions 15 and 16, and the first waterproof portion 21 of the present embodiment is disposed in the second barrel portion 16 and extends in the first direction L.
The second waterproof portion 22 is waterproof to the terminal connecting portion 11 side from the tip end of the core wire 51. The second waterproof portion 22 is disposed at an end portion of the wire connection portion 12 on the terminal connection portion 11 side and extends in the second direction W. It is preferable that at least a part of the second waterproof portion 22 is provided in a region where the core wire 51 is placed. The second waterproof portion 22 is sandwiched between the mutually overlapped tube sheet portions 15 and 16, for example, to form a waterproof region in the gap between the tube sheet portions 15 and 16.
The second waterproof portions 22 overlap each other in the crimping step, and can also close the gap on the terminal connection portion 11 side with respect to the end of the core wire 51. The second waterproof portion 22 suppresses water immersion from the terminal connection portion 11 side to between the wire connection portion 12 and the core wire 51.
The third waterproof portion 23 suppresses entry of water from the gap between the wire connecting portion 12 and the cover 52. The third waterproof portion 23 is disposed at an end portion of the wire connecting portion 12 opposite to the terminal connecting portion 11 side, and extends in the second direction W. The third waterproof portion 23 is sandwiched between the cover sheet 52 and the electric wire connecting portion 12, thereby forming a waterproof region between the cover sheet 52 and the electric wire connecting portion 12.
The terminal fitting 10 described above is processed to have a flat plate-like wire connection portion 12 shown in fig. 5 through a pressing step of a single metal plate serving as a base material. In the subsequent bonding step, the waterproof member 20 is bonded to the flat plate-like wire connection portion 12. Thereafter, the terminal fitting 10 is formed with the terminal connecting portion 11 and the U-shaped wire connecting portion 12 in the bending process.
In the present embodiment, the terminal interlock body 30 shown in fig. 7 is formed by a pressing step and a bending step. The terminal interlock body 30 interlocks a plurality of crimp terminals 1, and is formed of a single metal plate. The terminal interlock body 30 is supplied to the terminal crimping device 100. The terminal crimping device 100 performs a crimping process and a terminal cutting process on the terminal interlock body 30. The crimping step is a step of crimping the crimp terminal 1 of the terminal interlock body 30 and the electric wire 50. The terminal cutting step is a step of cutting the crimp terminal 1 crimped with the electric wire 50 from the terminal interlock body 30.
The terminal interlock body 30 is an aggregate of the crimp terminal 1. The terminal lock body 30 includes a connecting piece 31, a plurality of crimp terminals 1, and a plurality of connecting portions 32. The connecting piece 31, the crimp terminal 1, and the connecting portion 32 are integrally formed of the same base material. In the terminal interlock body 30, the crimp terminals 1 are arranged in parallel at equal intervals in the same direction. In the terminal interlock body 30, one end portions of the crimp terminals 1 are connected to each other by a connecting piece 31. The shape of the connecting piece 31 is, for example, a rectangular, elongated plate shape. The connecting piece 31 extends in the second direction W. The wire connecting portion 12 is connected to the connecting piece 31 via the connecting portion 32.
More specifically, the connecting portion 32 connects the end of the bottom portion 14 opposite to the terminal connecting portion 11 side to the connecting piece 31.
The connecting piece 31 has a plurality of terminal transfer holes 31 a. The terminal transmission holes 31a are arranged at equal intervals along the transmission direction of the terminal interlock body 30. The terminal transfer hole 31a is a through hole that penetrates the connecting piece 31 in the plate thickness direction. The crimp terminal 1 is positioned with respect to a crimping device 102 described later by the terminal transfer hole 31 a. The terminal interlock body 30 is placed on the terminal crimping device 100 in a state of being wound in a roll shape.
As shown in fig. 8, the terminal crimping device 100 has a terminal feeding device 101, a crimping device 102, and a driving device 103. The terminal crimping apparatus 100 is an apparatus called a crimping die in this technical field. The terminal feeding device 101 is a device that feeds the crimp terminal 1 to a predetermined crimping position. The crimping device 102 is a device that crimps the crimp terminal 1 to the electric wire 50 at a predetermined crimping position. The driving device 103 is a device that operates the terminal supplying device 101 and the crimping device 102.
The terminal supply device 101 sequentially pulls out the terminal interlock body 30 wound in a roll shape from the outer peripheral side. The terminal feeding device 101 sequentially feeds the crimp terminal 1 of the pulled-out terminal interlock body 30 from the foremost side to the crimping position. When the foremost crimp terminal 1 is crimped with the electric wire 50 and cut off from the connecting piece 31, the terminal feeding device 101 feeds the newly foremost crimp terminal 1 to the crimping position. The terminal supply device 101 performs a supply operation every time the crimping step and the terminal cutting step of 1 crimp terminal 1 are completed, and supplies the next crimp terminal 1 to the crimping position.
The terminal feeding device 101 has a terminal conveying member 101a and a power transmission mechanism 101 b.
The terminal conveying member 101a has a protrusion portion inserted into the terminal conveying hole 31a of the connecting piece 31.
The terminal transmission member 101a moves the terminal interlock body 30 in the transmission direction in a state where the protrusion is inserted into the terminal transmission hole 31 a. The power transmission mechanism 101b operates the terminal conveying member 101a in conjunction with a pressure bonding operation (up-and-down movement of a ram 114A and the like described later) performed by the pressure bonding device 102. The terminal feeding device 101 moves the terminal conveying member 101a in the up-down direction and the conveying direction in conjunction with the crimping operation of the crimping device 102, thereby feeding the crimp terminal 1 to the crimping position.
The crimping device 102 performs a crimping process of crimping the supplied crimp terminal 1 to the electric wire 50; and a terminal cutting step of cutting the crimp terminal 1 from the connecting piece 31. The crimping apparatus 102 has a crimper 110 and a terminal cutting mechanism 120.
The crimper 110 is a device that crimps the crimp terminal 1 to the electric wire 50 by riveting the crimp terminal 1 to an end of the electric wire 50. The crimper 110 of the present embodiment crimps the crimp terminal 1 to the electric wire 50 by winding and caulking the first barrel part 15 and the second barrel part 16 of the crimp terminal 1 to the core wire 51 and the sheath 52 of the electric wire 50. The crimper 110 has a frame 111, a first die 112, a second die 113, and a power transmission mechanism 114.
The frame 111 includes a base 111A, an anvil support 111B, a transmission support 111C, and a support base 111D. The base 111A is a member that forms a base of the terminal crimping device 100. The base 111A is fixed to a mounting base on which the terminal crimping device 100 is mounted.
The anvil support 111B, the transmission section support 111C, and the support base 111D are fixed to the base 111A.
The transmission section support 111C is disposed rearward (rightward in the paper of fig. 8) and upward (upward in the paper of fig. 8) with respect to the anvil support 111B. More specifically, the transmission section support body 111C has a vertically disposed section 111C1And indenter support portion 111C2. Vertical setting part 111C1Is disposed behind the anvil support body 111B and is vertically provided upward from the base 111A.
Indenter support portion 111C2Held in the vertically disposed part 111C1The upper part of (a). Indenter support portion 111C2Is a support portion for supporting a ram 114A described later. Indenter support portion 111C2Above the anvil support 111B, the anvil support 111B is disposed with a predetermined gap therebetween. The support base 111D is a base that supports the terminal connecting portion 11 of the crimp terminal 1. The height position of the upper surface of the support base 111D is substantially the same as the height position of the upper surface of the first mold 112.
The first mold 112 is paired with a second mold 113. The first mold 112 and the second mold 113 are arranged at a vertical interval. The first mold 112 and the second mold 113 crimp the crimp terminal 1 with the electric wire 50 by sandwiching the crimp terminal 1 and the electric wire 50 therebetween as shown in fig. 10. The first mold 112 is a mold for supporting the crimp terminal 1 from below. The first die 112 is formed with 2 lower dies having a first anvil 112A as a first lower die and a second anvil 112B as a second lower die. The first anvil 112A and the second anvil 112B are, for example, integrally formed. The second mold 113 is disposed above the first mold 112. The second mold 113 is formed with 2 upper molds, and has a first winder 113A as a first upper mold and a second winder 113B as a second upper mold.
The first anvil 112A and the first winder 113A are vertically opposed to each other. The first anvil 112A and the first compressor 113A crimp the core wire crimping part 12A. That is, the first anvil 112A and the first winder 113A wind the U-shaped core wire crimping part 12A with respect to the core wire 51 of the electric wire 50 by narrowing the interval therebetween so as to be crimped to the core wire 51.
The second anvil 112B and the second crimper 113B are vertically opposed to each other. The second anvil 112B and the second crimper 113B crimp the skin crimping portion 12B. That is, the second anvil 112B and the second crimping machine 113B wind the U-shaped sheath crimping section 12B around the sheath 52 by narrowing the interval therebetween, and crimp-contact the sheath 52.
The driving device 103 transmits power to the power transmission mechanism 114, thereby narrowing the gap between the first die 112 and the second die 113 in the crimping step and crimping the wire connection portion 12 and the wire 50. On the other hand, when the crimping step is completed, the driving device 103 widens the distance between the first die 112 and the second die 113. In the crimping apparatus 102 of the present embodiment, the second die 113 moves up and down with respect to the first die 112, and the interval between the pair of dies 112 and 113 changes.
Further, in the first die 112, the first anvil 112A and the second anvil 112B may be separately formed, and in the second die 113, the first compressor 113A and the second compressor 113B may be separately formed. In this case, the driving device 103 and the power transmission mechanism 114 may be configured to move the first compressor 113A and the second compressor 113B up and down, respectively.
The power transmission mechanism 114 transmits the power output from the driving device 103 to the first and second compressors 113A and 113B. As shown in fig. 8, the power transmission mechanism 114 has a ram 114A, a ram bolt 114B, and a shank 114C.
The ram 114A is a movable member, and is opposed to the ram support portion 111C2Is supported so as to be movable up and down. The second die 113 is fixed to the ram 114A. Therefore, the first and second compressors 113A and 113B are integrated with the ram 114A, and are supported by the ram support portion 111C2And move up and down. The ram 114A is, for example, a rectangular parallelepiped. The ram 114A is formed with a female screw portion (not shown). The female screw portion is formed on the inner circumferential surface of a hole in the vertical direction formed from the inner side to the upper end surface of the ram 114A.
The ram bolt 114B has an external thread portion (not shown) that is screwed to an internal thread portion of the ram 114A. Therefore, the ram bolt 114B is integrated with the ram 114A and faces the ram support portion 111C2And move up and down. The ram bolt 114B has a bolt head 114B disposed above the male screw thread portion1. At the bolt head 114B1A female screw portion (not shown) is formed. Bolt head 114B1Is formed on the head 114B of the slave bolt1The inner side of the upper end face of the inner tube is formed with an inner peripheral surface of a hole in the vertical direction.
The shank 114C is a cylindrical hollow member having an external thread 114C at each end1And a connecting portion (not shown). External threaded portion 114C of shank 114C1 A bolt head 114B formed at the lower side of the hollow member and screwed to the ram bolt 114B1The internal thread portion of (3). Therefore, the shank 114C is integrated with the ram 114A and the ram bolt 114B, and is opposed to the ram support portion 111C2And move up and down. The connecting portion of the handle 114C is connected to the driving device 103.
The drive device 103 includes: a drive source (not shown); and a power conversion mechanism (not shown) for converting the driving force of the driving source into the power in the vertical direction. The connecting portion of the lever 114C is connected to the output shaft of the power conversion mechanism. Therefore, the first compressor 113A and the second compressor 113B use the output (dynamic motion) of the driving device 103Output of force conversion mechanism), is integrated with the ram 114A, the ram bolt 114B, and the shank 114C, and is opposed to the ram support portion 111C2And move up and down. As a driving source of the driving device 103, an electric actuator such as a motor, a hydraulic actuator such as a hydraulic cylinder, an air pressure actuator such as an air cylinder, and the like can be applied.
By adjusting the head 114B of the bolt1And the external thread portion 114C of the shank 114C1So that the relative position of the first winder 113A with respect to the first anvil 112A in the up-down direction and the relative position of the second winder 113B with respect to the second anvil 112B in the up-down direction are changed. The nut 114D is screwed to the male screw portion 114C of the shank 114C above the ram bolt 114B1. Therefore, the nut 114D and the bolt head 114B1Together form the function of a so-called locknut.
The nut 114D is fastened to the head bolt 114B side after the adjustment of the relative position is completed, so that the first and second compressors 113A and 113B can be fixed at the relative position.
As shown in fig. 10, a concave surface 112A recessed downward is formed at each upper end of the first anvil 112A and the second anvil 112B1、112B1. Each concave surface 112A1、112B1The cross-sectional shape is formed in an arc shape in accordance with the shape of each bottom portion 14 of the U-shaped core wire crimping portion 12A and the U-shaped sheath crimping portion 12B. In the crimper 110, each concave surface 112A1、112B1At the crimping position. In the crimp terminal 1 in which the bottom part 14 is supplied to the lower side, the bottom part 14 of the core wire crimping part 12A is placed on the concave surface 112A of the first anvil 112A1The bottom 14 of the skin-covered pressure-bonding section 12B is placed on the concave surface 112B of the second anvil 112B1. The first mold 112 has a concave surface 112A1、1112B1And supported by the anvil support body 111B in an upwardly exposed state.
As shown in fig. 10, concave portions 113A recessed upward are formed in the first compressor 113A and the second compressor 113B, respectively1、113B1. Each concave portion 113A1、113B1Respective concave shapes with respect to the first anvil 112A and the second anvil 112BFace 112A1、112B1Are arranged to face each other in the vertical direction. Each concave portion 113A1、113B1Comprising: first and second walls 115, 116; third wall 117. The first wall surface 115 and the second wall surface 116 face each other in the second direction W. The third wall 117 connects the upper ends of the first and second walls 115, 116. Each concave portion 113A1、113B1The first to third wall surfaces 115, 116 and 117 are brought into contact with the first and second barrel portions 15 and 16, and the first and second barrel portions 15 and 16 are crimped while being wound around the end of the electric wire 50. Each concave portion 113A1、113B1The caulking operation can be performed.
The crimp terminal 1 crimped by the crimper 110 is cut off from the connecting piece 31 by the terminal cutting mechanism 120. The terminal cutting mechanism 120 sandwiches and cuts the connecting portion 32 of the crimp terminal 1 supplied to the crimping position with the two terminal cutting portions, and the cutting is performed in conjunction with the performing of the crimping step. As shown in fig. 8, the terminal cutting mechanism 120 is disposed on the front side (left side of the paper surface in fig. 8) of the second anvil 112B. The terminal cutting mechanism 120 includes a terminal cutting body 121, a pressing member 122, and an elastic member 123.
The terminal cutting body 121 is shaped like a rectangular parallelepiped and is disposed to be slidable in the up-down direction along the front surface of the 2 nd anvil 112B. As shown in fig. 11 and 12, the terminal cutting member 121 is formed with a groove 121B inwardly from the sliding surface 121a of the second anvil 112B. The groove 121b is a passage of the coupling piece 31 of the terminal interlock body 30. When the crimp terminal 1 to be crimped is supplied to the crimping position, a part of the connecting portion 32 connected to the crimp terminal 1 protrudes from the groove 121 b. The crimp terminal 1 supplied to the crimping position is supported by the first mold 112 from below.
The terminal cutting member 121 cuts the connecting portion 32 while moving up and down relative to the first mold 112 and the crimp terminal 1. Here, the position where the connecting piece 31 and the like can be inserted into the groove 121b is an initial position in the vertical direction of the terminal cutting member 121. As shown in fig. 13, the end of the connecting portion 32 on the wire connecting portion 12 side protrudes from the groove 121b through the opening of the groove 121b on the sliding contact surface 121a side (i.e., the crimp terminal 1 side). In the terminal cut-off member 121, an edge portion 121c on the upper side of the opening (hereinafter referred to as "opening edge") is used as one terminal cut-off portion. The other terminal cutting portion is an upper surface edge 112a of the second anvil 112B.
The pressing member 122 is fixed to the ram 114A, and moves up and down integrally with the ram 114A. The pressing member 122 is disposed above the terminal cut-off body 121, and is lowered to press the terminal cut-off body 121. The pressing member 122 is shaped as a rectangular parallelepiped. The elastic member 123 is configured to apply an upward urging force to the terminal cutting member 121 and is formed of a spring member or the like. The elastic member 123 returns the terminal cutting member 121 to the initial position in the vertical direction when the pressing force from the pressing member 122 is released.
In the terminal cutting mechanism 120, the pressing member 122 is lowered together with the lowering of the second die 113 during the press-bonding process, and the terminal cutting member 121 is pressed. The terminal cutting member 121 is lowered, whereby the connection portion 32 is sandwiched between the opening edge 121c of the groove 121B and the upper surface edge 112a (fig. 13) of the second anvil 112B. In the terminal cutting mechanism 120, the opening edge 121c and the upper surface edge 112a function as a shear, and a shearing force is applied to the connecting portion 32. When the terminal cutting member 121 is further pressed, the opening edge 121c and the upper surface edge 112a cut the connecting portion 32, and the crimp terminal 1 is cut off from the connecting piece 31. In order to improve the cutting performance, the opening edge 121c is inclined with respect to the upper surface edge 112a on the sliding contact surface 121 a.
As shown in fig. 13, the electric wire 50 to be crimped is disposed at a predetermined position between the terminal cutting member 121 and the pressing member 122. Specifically, the electric wire 50 is placed on the upper surface 121d of the terminal cutting member 121. Therefore, a space for escape of the electric wire 50 is provided in at least one of the upper portion of the terminal cut-off body 121 and the lower portion of the pressing member 122, so that the electric wire 50 is not crushed therebetween.
Here, the predetermined position is a position at which the end of the wire 50 before the crimping process is present above the bottom portion 14 of the flat plate-shaped wire connection portion 12. The predetermined position is a position where the distal end of the core wire 51 pressed together with the start of the crimping process can be placed on the bottom portion 14 of the core wire crimping section 12A without being exposed from the core wire crimping section 12A. The core wire 51 extends in the axial direction along with the crimping process, and the end position of the core wire 51 moves in the axial direction. It is preferable that the predetermined position is determined in consideration of the extension.
On the other hand, the end portion (core wire 51, sheath 52 at the tip) of the electric wire 50 is pressed down to the inner wall surface side of the electric wire connecting portion 12 at the second mold 113. Therefore, if no holding is performed, the wire 50 may float from the upper surface 121d of the terminal cut body 121, and the core wire 51 and the sheath 52 at the end may be crimped without being placed on the bottom portion 14 of the wire connecting portion 12. Therefore, the terminal crimping device 100 according to the present embodiment is provided with the wire holding mechanism for holding the wire 50 at a predetermined position with respect to the upper portion of the terminal cut-off body 121, and suppressing positional deviation of the end of the wire 50 with respect to the wire connecting portion 12 during crimping.
The wire holding mechanism includes a wire presser 118 for pressing and holding the wire 50 placed on the upper surface 121d of the terminal cutting body 121 serving as the wire placing portion against the upper surface 121d (fig. 13). The wire pressing member 118 is disposed above the terminal cutting member 121 and between the second mold 113 and the pressing member 122. A space (hereinafter referred to as "wire holding space") 118A for holding the coating 52 of the electric wire 50 is formed between the upper surface 121d of the terminal cut body 121 and the lower surface of the wire presser 118. The wire holding space 118A suppresses the wire 50 from floating from the upper surface 121d of the terminal cut body 121 in the crimping step, and suppresses positional deviation of the core wire 51 and the sheath 52 at the terminal with respect to the wire connecting portion 12. The wire pressing member 118 is vertically movable with respect to the upper surface 121d of the terminal cutting member 121, and is continuously lowered to form a wire holding space 118A with the upper portion of the terminal cutting member 121. The wire pressing member 118 is fixed to the ram 114A, for example, and moves up and down integrally with the ram 114A. The electric wire 50 is held in the electric wire holding space 118A formed together with the lowering of the electric wire presser 118.
With the terminal crimping device 100 configured as described above, when the core wire crimping section 12A and the core wire 51 are crimped, the core wire crimping section 12A is pressed against the core wire 51 at a high pressure, the core wire 51, the core wire crimping section 12A, and the waterproofing member 20, which have received the pressing force, extend in the first direction L, there is a possibility that the pressed core wire 51 extends to be exposed from the core wire crimping section 12A to the outside in the crimping step, or the pressed waterproofing member 20 is largely exposed from the core wire crimping section 12A to the outside, and as a result, there is a possibility that the sealing property is lowered and the electrical performance is lowered in the crimp terminal 1, and further, if the waterproofing member 20 is excessively exposed from the core wire crimping section 12A, the waterproofing member 20 adheres to the second mold 113, and as a result, there is a possibility that the sealing property is lowered, or the crimp terminal 1 cannot be smoothly taken.
As described below, the terminal crimping device 100 of the present embodiment has a configuration capable of suppressing the exposure of the core wire 51 and the waterproof member 20 from the core wire crimping section 12A. As shown in fig. 15, in the second mold 113 of the present embodiment, a concave portion 113A1Has an enlarged diameter portion 113C. The diameter-expanding portion 113C is provided in the concave portion 113A1The second compressor 113B side. That is, the enlarged diameter portion 113C is provided at the end portion on the distal end side of the core wire 51 to be crimped.
The expanded diameter portion 113C is formed of a concave portion 113A in comparison with a portion 113D on the base end side of the expanded diameter portion 113C1The cross-sectional area of the space surrounded by the first mold 112 is large, and the "cross-sectional area" mentioned here is the cross-sectional area of the cross-section perpendicular to the first direction L, and the portion 113D on the base end side is the portion in contact with the concave portion 113A1The enlarged diameter portion 113C is located closer to the second compressor 113B. In the enlarged diameter portion 113C, the third wall 117 is wider upward than the base end side portion 113D. More specifically, the third wall surface 117 of the first compressor 113A has a step 117A at an end portion far from the second compressor 113B. The step 117A is located one step above the other portion of the third wall 117 of the first compressor 113A. The height position of the third wall surface 117 changes in a step shape toward the step 117A. As shown in fig. 14, the step 117A has an arc shape in plan view, as in the other portions of the third wall 117.
The expanded diameter portion 113C is formed by a concave portion 113A in comparison with a proximal end portion 113D1The cross-sectional area of the space surrounded by the first mold 112 is large. The relationship between the size of the cross-sectional area and the position of the second mold 113 in the third direction HThe magnitude relationship of the same case comparison. The diameter-enlarged portion 113C is formed so as to satisfy the above-described magnitude relationship when the second mold 113 is at least at the bottom dead center, for example. The bottom dead center is a lower end position of a range in which the second mold 113 moves up and down. In the case where the second mold 113 is located at the bottom dead center, the first mold 112 is closest to the second mold 113 in the third direction H.
According to the second mold 113 of the present embodiment, when the core wire pressure-bonding section 12A is pressure-bonded to the core wire 51 of the electric wire 50, the pressing force of the diameter-enlarged section 113C is lower than the pressing force of the base-end section 113D, and the compression rate of the diameter-enlarged section 113C compressing the core wire 51 is lower than the compression rate of the base-end section 113D compressing the core wire 51, thereby preventing the core wire 51 from being exposed from the core wire pressure-bonding section 12A and the waterproof member 20 from being excessively exposed, the diameter-enlarged section 113C of the present embodiment is provided in a range corresponding to the third waterproof section 23 in the first direction L, that is, the diameter-enlarged section 113C is provided in the concave section 113a1 at a position compressing the third waterproof section 23, thereby making it possible to favorably prevent the waterproof member 20 from being excessively exposed, for example, exposed as if it adheres to the second.
The enlarged diameter portion 113C of the present embodiment is configured by enlarging the third wall surface 117 upward. The height from the concave surface 112a1 to the third wall surface 117 of the first mold 112 is low at the base end side portion 113D and relatively high at the enlarged diameter portion 113C. On the other hand, the distance in the second direction W between the first wall surface 115 and the second wall surface 116 is equal to the distance between the enlarged diameter portion 113C and the proximal end portion 113D. That is, the enlarged diameter portion 113C is formed to reduce the flattening of the core wire pressure-bonding section 12A and the core wire 51 after pressure bonding as compared with the base end side portion 113D. The core wire pressure-bonding section 12A pressure-bonded by the enlarged diameter section 113C has a small flattening ratio, and the core wire 51 and the waterproof member 20 are less likely to be exposed from the outside of the core wire pressure-bonding section 12A.
Fig. 16 shows the wire connecting portion 12 crimped with the wire 50 by the second die 113 of the present embodiment. Fig. 17 shows a longitudinal section of the crimped wire connection portion 12. Fig. 17 is a cross section perpendicular to the second direction W, and shows a cross section along the center line of the electric wire 50. The wire connection section 12 to which the waterproof member 20 is previously attached is pressure-bonded to the wire 50, thereby manufacturing the terminal-equipped wire 2. The waterproofing members 20 are compressed and adhered to each other in the crimping process, blocking the end openings of the core wire crimping portions 12A.
In addition, the waterproof member 20 covers the distal end portion of the core wire 51, and restricts entry of water into the internal space of the core wire crimping section 12A. Further, when a part of the waterproof member 20 compressed between the electric wire 50 and the wire connection portion 12 is pushed out toward the terminal connection portion 11, the pushed-out waterproof member 20 can cover the distal end portion of the core wire 51 and block the opening of the core wire crimping portion 12A.
As shown in fig. 16, the core wire pressure-bonding section 12A after pressure bonding according to the present embodiment has an enlarged diameter section 12D at an end on the terminal connection section 11 side. The cross-sectional area of the enlarged diameter portion 12D (for example, the area surrounded by the outermost diameter of the enlarged diameter portion 12D) is larger than the cross-sectional area of the proximal-end portion 12E of the core wire pressure-bonding section 12A (for example, the area surrounded by the outermost diameter of the proximal-end portion 12E). The difference in cross-sectional area corresponds to the difference in shape between the expanded diameter portion 113C of the second mold 113 and the base end side portion 113D. The enlarged diameter portion 12D is different from the proximal portion 12E mainly in the height dimension, that is, the length in the third direction H. The height of the enlarged diameter portion 12D is higher than the height of the base end side portion 12E. The width of the enlarged diameter portion 12D is the same as the width of the proximal portion 12E.
Fig. 20 shows a longitudinal section of a core wire crimping part according to a comparative example. The second die for crimping the core wire pressure-bonding section 12A of the comparative example is different from the second die 113 of the present embodiment in that the enlarged diameter section 113C is not provided. In the core wire crimping part 12A of the comparative example, the waterproof member 20 and the core wire 51 are exposed largely outside from the core wire crimping part 12A after the crimping. This is because the distal end portion of the core wire crimping portion 12A is greatly compressed as in the other portions. The waterproof member 20 is largely exposed to deteriorate the waterproof performance, or the waterproof member 20 adheres to the second mold 113. In contrast, in the core wire pressure-bonding section 12A pressure-bonded by the second mold 113 of the present embodiment, as shown in fig. 17, the waterproof member 20 and the core wire 51 are not greatly exposed outside the core wire pressure-bonding section 12A. The waterproof member 20 is slightly exposed from the core wire crimping portion 12A, but is not exposed to adhere to the second mold 113. The waterproof member 20 covers the tip of the core wire 51 and seals the gap between the core wire 51 and the core wire crimping portion 12A. Therefore, the terminal crimping device 100 of the present embodiment can suppress a decrease in the sealing property and a decrease in the electrical performance of the core wire crimping section 12A. In addition, the terminal crimping device 100 of the present embodiment can suppress the waterproof member 20 from adhering to the second mold 113.
In addition, according to the second mold 113 of the present embodiment, as described below, it is possible to improve the electrical performance of the core wire pressure-bonding section 12A, fig. 21 shows the end of the core wire pressure-bonding section 12A of the comparative example, fig. 21 shows the end of the core wire pressure-bonding section 12A of fig. 20 as viewed from the first direction L, in the core wire pressure-bonding section 12A of the comparative example, the tip 15a of the first barrel part 15 abuts against the inner surface and the bottom part 14 of the second barrel part 16, the tip 15a of the first barrel part 15 abuts against the inner wall surface in the middle of the pressure-bonding, and further deformation of the first barrel part 15 is easily restricted, and as a result, the first barrel part 15 and the second barrel part 16 are hard to be properly overlapped with each other.
On the other hand, in the core wire pressure-bonding section 12A according to the present embodiment, as shown in fig. 19, the tip 15a of the first barrel part 15 does not abut against the inner wall surface at the time point when the pressure bonding is completed. After crimping is completed, the tip end 15a of the first barrel portion 15 is separated from the bottom portion 14. The enlarged diameter portion 113C is formed to be pressed against the core wire 51 without bringing the distal end 15a of the first barrel portion 15 into contact with the bottom portion 14. Since the first barrel portion 15 does not abut against the bottom portion 14, it is difficult to restrict the deformation of the first barrel portion 15 in the middle of the pressure bonding. When the first barrel portion 15 and the second barrel portion 16 are folded inward and overlapped with each other, it is difficult to prevent deformation of the barrel portions 15 and 16, and a sufficient overlapping amount and a sufficient overlapping width are secured. Therefore, the terminal crimping device 100 according to the present embodiment can improve the electrical performance of the core wire crimping section 12A after crimping.
Example 2 of the embodiment will be explained with reference to fig. 22 to 28. Fig. 22 is a front view of a second mold according to example 2 of the embodiment; fig. 23 is a perspective view of a second mold according to example 2 of the embodiment; fig. 24 is a sectional view of a second mold according to example 2 of the embodiment; fig. 25 is a perspective view of a first mold according to example 2 of the embodiment; fig. 26 is a perspective view of a terminal-equipped electric wire according to embodiment 2 of the present invention; fig. 27 is a cross-sectional view of the terminal-equipped electric wire according to embodiment 2 of the present invention, and fig. 28 is another cross-sectional view of the terminal-equipped electric wire according to embodiment 2 of the present invention. Fig. 24 shows a section XXIV-XXIV of fig. 22. Fig. 27 shows a section XXVII-XXVII of fig. 26. Fig. 28 shows a section XXVIII-XXVIII of fig. 26.
In embodiment 2, the diameter-enlarged portion 113C of the second die 113 has a flat surface portion 117A1. Plane portion 117A1As shown in fig. 22 and 24, the third direction H is a plane opposed to the first mold 112. Plane portion 117A1For example, a plane parallel to the second direction W. Plane portion 117A1Or may be parallel to first direction L, planar portion 117A of embodiment 21Is a plane parallel to the first direction L and the second direction W, the plane part 117A1Is a plane perpendicular to the moving direction of the second mold 113.
As shown in fig. 22, flat surface 117A1Is part of the third wall 117. The step 117A of the third wall surface 117 has a flat surface 117A1First bent portion 117A2And a second curved portion 117A3. First curved portion 117A2Plane part 117A1Engaging the first wall 115. Second curved portion 117A3Plane part 117A1Engaging the second wall 116. First curved portion 117A2And a second curved portion 117A3Are respectively concave curved surfaces, the curved portion 117A when viewed from the first direction L2、117A3The curved shape of (2) is, for example, a circular arc. As shown in fig. 23, flat surface 117A1First bent portion 117A2And a second curved portion 117A3Respectively, extend in the first direction L toward the base end side portions 113D.
As shown in fig. 25, the first mold 112 of embodiment 2 has a protrusion 112C. The protrusion 112C extends from the concave surface 112A of the first anvil 112A1And (4) protruding. The protrusion 112C is provided on the concave surface 112A1The protrusion 112C extends along the first direction L, the range of the protrusion 112C in the first direction L corresponds to the range of the core wire 51 of the electric wire 50, the protrusion 112C is phase-changed by increasing the core wire 51With respect to the compression rate of the electric wire 50, adhesion of the core wire 51 to the core wire crimping part 12A is promoted.
As shown in FIG. 24, in the first direction L, the diameter-enlarged portion 113C is located on the front side of the projection 112C, in the description of the second mold 113, "front side" shows the first compressor 113A side as viewed from the second compressor 113B, "rear side" shows the second compressor 113B side as viewed from the first compressor 113A, the front and rear sides correspond to the front and rear sides of the crimp terminal 1 described later, in the first direction L, the range R1 in which the diameter-enlarged portion 113C extends is separated from the range R2 in which the projection 112C extends by a predetermined distance, the distance is determined so that the effect of adhesion promotion by the projection 112C does not decrease, in the third wall 117, the rear end of the diameter-enlarged portion 113C is an inclined portion 117A connected to the portion 113D on the base end side4。
Fig. 26 to 28 show a terminal-equipped electric wire 2 manufactured by a first mold 112 and a second mold 113 according to embodiment 2. In the wire connecting portion 12, the core wire crimping portion 12A has a diameter-enlarged portion 12D and a base end side portion 12E. The enlarged diameter portion 12D is a portion pressed by the enlarged diameter portion 113C of the second die 113. The base end side portion 12E is a portion crimped by the base end side portion 113D of the second die 113. The shape of the concave portion 113A1 of the first compressor 113A is transferred to the core wire pressure-contact portion 12A. In other words, the shape of the core wire crimping portion 12A of the terminal-equipped wire 2 is a shape corresponding to the shape of the concave portion 113a 1.
As shown in fig. 26 to 28, the enlarged diameter portion 12D has a flat portion 12F. As shown in fig. 27, the flat portion 12F faces the bottom portion 14 in the third direction H. Outer side surface 12F of flat portion 12F1Parallel to the second direction W. Lateral surface 12F1Corresponds to the shape of the flat surface portion 117a1 of the first die 112. As shown in FIG. 28, lateral side 12F1Parallel to the first direction L, that is, in the terminal-equipped wire 2 of embodiment 2, the outer side face 12F1 is a plane perpendicular to the third direction H.
As shown in fig. 28, a recess 14a is formed in the bottom portion 14, the recess 14a is formed by the protrusion 112C of the first mold 112, a portion 12e of the recess 14a formed on the base end side, the recess 14a is recessed toward the core wire 51, the recess 14a is a groove extending in the first direction L, the enlarged diameter portion 12D is spaced from the recess 14a in the first direction L, and the enlarged diameter portion 12D is located on the front side of the front end of the recess 14 a.
The waterproofing member 20 covers the distal end 51a of the core wire 51 and blocks the opening of the core wire crimping section 12A on the side of the coupling section 13. The enlarged diameter portion 12D accommodates the waterproof member 20.
In the second mold 113, a flat surface portion 117A is provided in the diameter-enlarged portion 113C1As described below, the extension of the wire connection portion 12 in the crimping step is suppressed. By providing a flat portion 117A1The cross-sectional area of the enlarged diameter portion 113C can be increased. That is, the cross-sectional area of the region surrounded by the first die 112 and the enlarged diameter portion 113C can be increased at the time of pressure bonding. As shown in fig. 22, the step 117A is substantially rectangular in shape. The cross-sectional shape of the diameter-enlarged portion 12D of the core wire crimping portion 12A corresponds to the shape of the step 117A, and is substantially rectangular as shown in fig. 27.
More specifically, the diameter-enlarged portion 12D has a side wall portion 12D2And a corner portion 12D of a curved shape1. A pair of side walls 12D2、12D2Extending in a third direction H from the bottom 14 to the flat 12F. Corner 12D1The flat portion 12F is connected to the side wall portion 12D 2. A pair of side walls 12D2、12D2Are opposed to each other in the second direction W and are substantially parallel to each other. That is, the dimension of the enlarged diameter portion 12D in the second direction W is substantially constant from the lower end to the upper end of the third direction H. Therefore, the sectional area of the enlarged diameter portion 12D is maximized for the same terminal height H1.
The terminal height H1 is a crimp height, which is a dimension in the third direction H of the crimp terminal 1 after crimping.
In the pressure bonding step, the volume is absorbed in the corner 12D1 of the enlarged diameter portion 12D. By absorbing the volume in the corner portion 12D1, the amount of extension of the wire connecting portion 12 to the front side is reduced. As a result, variations in the length of the crimp terminal 1 are suppressed. Further, the step occurring between the enlarged diameter portion 12D and the base end side portion 12E is minimized by maximizing the cross-sectional area of the enlarged diameter portion 12D and suppressing the terminal height H1. Therefore, the inclination angle of the inclined portion 12J (see fig. 28) formed at the rear end of the enlarged diameter portion 12D is gentle, and the waterproof performance is less likely to be lowered.
The cross-sectional area of the enlarged diameter portion 12D is large, so that the amount of extension of the wire connection portion 12 and the core wire 51 in the first direction L is reduced in the crimping step, and the reduction of the amount of extension of the core wire 51 suppresses the reduction of the waterproof performance relating to the waterproof member 20, and the variation of the amount of extension of the wire connection portion 12 in the crimping step is reduced due to the reduction of the amount of extension of the wire connection portion 12, and as a result, the properties such as fixability and resistance value are stabilized in the terminated wire 2, and the strength of the core wire 51 is hardly reduced by the reduction of the amount of extension of the core wire 51.
In addition, by reducing the amount of extension of the wire connecting portion 12, the crimp terminal 1 after crimping can be downsized. For example, in the case where the connector is required to be downsized, the depth dimension of the terminal accommodating portion accommodating the crimp terminal 1 is shortened. As a result, it is considered that the length of the crimp terminal 1 after crimping needs to be shortened. The method of manufacturing the terminal-equipped electric wire according to embodiment 2 uses the enlarged diameter portion 113C having the flat surface portion 117A1The second mold 113 causes the wire connection portion 12 to be pressure-bonded to the wire 50. This can shorten the length of the crimp terminal 1.
Further, in the second die 113 according to embodiment 2, the diameter-enlarged portion 113C is disposed apart from the protrusion 112C in the first direction L, and therefore, the diameter-enlarged portion 113C hardly influences the effect of promoting adhesion by the protrusion 112C, and therefore, the second die 113 according to embodiment 2 can satisfy both the securing of the electrical performance of the terminal-attached wire 2 and the stabilization of the length dimension of the crimp terminal 1.
Further, as shown in fig. 24, the second die 113 of embodiment 2 has a connected portion 117B and an inclined portion 117℃ the connected portion 117B and the inclined portion 117C are provided in the concave portion 113B1 of the second compressor 113B. the connected portion 117B and the inclined portion 117C are a part of the third wall surface 117. the connected portion 117B is located on the front side of the first direction L than the inclined portion 117℃ the connected portion 117B connects the connected portion 117D of the third wall surface 117 to the inclined portion 117℃ the connected portion 117D is a part of the connected pressure-bonding portion 12C of the wire pressure-bonding connecting portion 12. the connected portion 117D is inclined away from the first die 112 along the first direction L from the first compressor 113A side toward the second compressor 113B side.
The inclined portion 117C is inclined along the first direction L to approach the first mold 112 as it goes away from the first compressor 113A, that is, the inclined portion 117C and the concave surface 112B of the first mold 1121The interval H2 of the third direction H decreases as it goes away from the first compressor 113A along the first direction L the interval H2 of the third direction H varies at a certain ratio along the first direction L, for example, in the 2 nd embodiment, the inclined portion 117C extends to the concave portion 113B1The rear end of (1). In other words, in the third wall 117, the rear portion of the connected portion 117B is the inclined portion 117C. In the second mold 113 according to embodiment 2, the curved shape of the connecting portion 117B and the curved shape of the inclined portion 117C are common.
By providing the inclined portion 117C, the compression rate with respect to the sheath crimping portion 12B is increased along the first direction L as going away from the first compressor 113A, that is, the inclined portion 117C compresses the sheath crimping portion 12B with a high pressing force as going toward the rear side.
As shown in fig. 26 and 28, the sheath crimping portion 12B of the terminal-equipped electric wire 2 has a tapered portion 12G and a connection portion 12H. The tapered portion 12G is a portion pressed by the inclined portion 117C of the second die 113. The connection portion 12H is a portion that is pressure-bonded by the connection portion 117B of the second die 113.
The connection portion 12H is connected to the connection pressure-bonding section 12C, the tapered portion 12G is located on the rear side of the first direction L from the connection portion 12H, in the explanation of the crimp terminal 1, "front side" is the core wire pressure-bonding section 12A side viewed from the sheath pressure-bonding section 12B, "rear side" is the sheath pressure-bonding section 12B side viewed from the core wire pressure-bonding section 12A, in the tapered portion 12G, the terminal height H3 becomes lower as going from the front side toward the rear side, the terminal height H3 is the distance in the third direction H from the outer surface of the bottom portion 14 to the outer surface of the sheath pressure-bonding section 12B, on the other hand, in the connection portion 12H, the terminal height H3 does not change along the first direction L, in the connection portion 12H, the terminal height H3 is substantially constant regardless of the position of the first direction L, and therefore, in the cross-sectional view of fig. 28, the connection portion 12H is parallel to the bottom portion.
In a cross section perpendicular to the second direction W as shown in fig. 28, the terminal height H3 of the tapered portion 12G gradually decreases from the front side to the rear side, the terminal height H3 changes at a certain ratio, for example, along the first direction L by forming the tapered portion 12G at the sheath crimp portion 12B, the crimp strength of the sheath crimp portion 12B increases, in other words, in the sheath crimp portion 12B, the terminal height H3 becomes lower toward the rear side, so that the holding force of the sheath crimp portion 12B for holding the electric wire 50 increases.
In addition, as shown in FIG. 24, the interval H2 of the inclined portion 117C and the concave surface 112B1 decreases toward the rear side along the first direction L. in other words, the inclined portion 117C and the concave surface 112B1The cross-sectional area of the enclosed space decreases toward the rear side along the first direction L, and therefore, even if the sheath pressure-bonding section 12B attempts to extend toward the rear side in the pressure-bonding step, the extension can be suppressed.
The inclined portion 117C is inclined in a direction in which the sheath pressure-bonding section 12B is prevented from extending rearward, and the inclined portion 117C applies a reaction force toward the front side to the sheath pressure-bonding section 12B to be extended rearward, that is, the inclined portion 117C prevents the sheath pressure-bonding section 12B from extending due to not only a frictional force but also a reaction force toward the front side, and thus, the second mold 113 according to embodiment 2 can prevent the sheath pressure-bonding section 12B from extending toward the rear side of the first direction L.
In addition, the sheath crimping portion 12B crimped with the second mold 113 of embodiment 2 described above has the tapered portion 12G. The crimp terminal 1 in which the sheath crimping portion 12B is formed with the tapered portion 12G shows that the extension of the sheath crimping portion 12B is suppressed in the crimping process. That is, the second mold 113 according to embodiment 2, the method for manufacturing the terminal-equipped electric wire according to the second mold 113, and the terminal-equipped electric wire 2 have a common effect of suppressing the extension of the sheath pressure-bonding section 12B.
In addition, the waterproof performance of the terminal-equipped wire 2 having the connecting portion 12H is less likely to be degraded. A terminal-equipped electric wire in which the connection portion 12H is not provided and the connection pressure-bonding portion 12C and the tapered portion 12G are directly connected is used as a comparative example. In the electric wire with terminal of the comparative example, the cylindrical pieces 15 and 16 are bent at a large angle at the connection portion connecting the pressure-bonding section 12C and the tapered section 12G. As a result, a gap is formed between the first barrel portion 15 and the second barrel portion 16, and the waterproof performance is likely to be lowered.
In contrast, the skin-covered press-contact portion 12B of embodiment 2 has the connection portion 12H so that the bending angle of the barrel portion 15, 16 is small. As a result, in the terminal-equipped electric wire 2 of embodiment 2, the decrease in waterproof performance is suppressed.
As described above, the terminal-equipped wire 2 according to the present embodiment includes: an electric wire 50; a crimp terminal 1 having a wire connecting portion 12 wound and crimped with respect to a core wire 51 and a sheath 52 of a wire 50. The wire connecting portion 12 has an enlarged diameter portion 12D at the end portion on the distal end side of the core wire 51. The enlarged diameter portion 12D covers the distal end portion of the core wire 51 and accommodates the waterproof member 20 that seals the gap between the core wire 51 and the wire connecting portion 12. The cross-sectional area of the enlarged diameter portion 12D is larger than the cross-sectional area of a portion 12E closer to the base end side of the core wire 51 than the enlarged diameter portion 12D. The crimp terminal 1 crimped by the terminal crimping apparatus 100 of the present embodiment is formed with the enlarged diameter portion 12D, so that the amount of extension of the wire connecting portion 12 is reduced, and as a result, variation in the length of the crimp terminal 1 is suppressed. As a result, the terminal-equipped wire 2 according to the present embodiment has the following effects: performance degradation can be suppressed.
In the wire connecting portion 12 of the present embodiment, the bottom portion 14 of the portion that is pressure-contacted with the core wire 51 has a concave portion 14a that is concave on the core wire 51 side. The diameter-enlarged portion 12D is separated from the recess 14a in the axial direction of the electric wire 50. The recess 14a is formed by the protrusion 112C of the first mold 112. By forming the concave portion 14a, adhesion of the core wire 51 to the core wire crimping portion 12A is promoted. Further, since the diameter-enlarged portion 12D is formed in a portion away from the recess 14a, the effect of promoting adhesion by the recess 14a is less likely to be reduced.
In the terminal-equipped wire 2 of the present embodiment, the diameter-enlarged portion 12D is at the height of the crimp terminal 1Is opposite to the bottom 14 and has an outer side surface 12F1And a flat portion 12F parallel to the width direction of the bottom portion 14. The enlarged diameter portion 12D having the flat portion 12F has a larger cross-sectional area than the case without the flat portion 12F. Therefore, the expanded diameter portion 12D of the present embodiment can reduce the amount of extension of the wire connecting portion 12 and suppress variations in the length of the crimp terminal 1.
The diameter-enlarged portion 12D includes: side wall 12D extending in the height direction from bottom 14 to flat portion 12F2(ii) a Curved corner 12D joining flat portion 12F to side wall 12D21. The cross-sectional shape of the diameter-enlarged portion 12D is substantially rectangular. Therefore, the increase in the terminal width and the terminal height can be suppressed, and the cross-sectional area of the enlarged diameter portion 12D can be maximized.
The method for manufacturing a terminal-equipped wire according to the present embodiment includes a crimping step. The press-bonding step is performed by using a first die 112 and a die having a concave portion 113A1、113B1The second mold 113 of the crimp terminal 1 sandwiches the wire connecting portion 12 and the wire 50, and winds the wire connecting portion 12 around the core wire 51 and the sheath 52 of the wire 50 and crimps them.
In the method of manufacturing the terminal-equipped wire according to the present embodiment, in the crimping step, the wire connecting portion 12 and the wire 50 are crimped by the second die 113 having the enlarged diameter portion 113C. The diameter-expanded portion 113C is located in the concave portion 113A1On the distal end 51a side of the core wire 51. The diameter-enlarged portion 113C has a flat surface portion 117A facing the first die 1121. By having flat portions 117A1The second die 113 is pressed against the wire connecting portion 12, thereby forming the expanded diameter portion 12D having the flat portion 12F in the wire connecting portion 12. As a result, the cross-sectional area of the enlarged diameter portion 12D is increased, and variation in the length of the crimp terminal 1 is suppressed.
The terminal crimping device 100 of the present embodiment includes a first die 112 and a second die 113.
The first mold 112 uses a concave surface 112A1、112B1And a lower die for supporting the wire connecting portion 12 of the crimp terminal 1. The second mold 113 has a concave portion 113A1、113A2. Concave portion 113A1、113A2Is at the same time asThe first mold 112 sandwiches the wire connecting portion 12 and the electric wire 50 therebetween, and winds the wire connecting portion 12 around the core wire 51 and the sheath 52 of the electric wire 50 and pressure-bonds the same.
The end of the concave portion 113a1 on the distal end side of the core wire 51 is provided with an enlarged diameter portion 113C. The expanded diameter portion 113C is formed by a concave portion 113A in comparison with a portion 113D on the base end side of the core wire 51 with respect to the expanded diameter portion 113C1The cross-sectional area of the space surrounded by the first mold 112 is large. Therefore, in the terminal crimping device 100 of the present embodiment, when the core wire crimping part 12A is crimped to the core wire 51, the degree of compression of the end part on the distal end side of the core wire 51 is made lower than the degree of compression of the other parts.
Therefore, the terminal crimping device 100 of the present embodiment can suppress the exposure of the core wire 51 from the core wire crimping section 12A and the excessive exposure of the waterproof member 20. Since the degree of compression of the enlarged diameter portion 113C is low, a sufficient amount of the waterproofing member 20 can be made to exist between the core wire 51 and the core wire pressure-bonding section 12A after the pressure bonding is completed. Further, the enlarged diameter portion 113C has a large cross-sectional area, thereby suppressing interference between the first barrel portion 15 and the second barrel portion 16 when the wire 50 is wound. Further, the extension of the wire connecting portion 12 is reduced by providing the enlarged diameter portion 113C. As a result, variations in the length of the crimp terminal 1 are suppressed.
In addition, in the expanded diameter portion 113C, a concave portion 113A is formed in comparison with a portion 113D on the base end side of the core wire 511Recessed to the opposite side of the first mold 112. The third wall 117 is provided with a step 117A recessed toward the opposite side of the first mold 112. The step 117A is an escape structure at the time of crimping, and allows escape of the compressed core wire crimping part 12A and the core wire 51. The concave portion 113a1 is recessed toward the opposite side of the first mold 112, and thus the exposure of the core wire 51 from the core wire pressure-bonding section 12A and the excessive exposure of the waterproof member 20 can be appropriately suppressed. Further, the concave portions 113a1 are recessed toward the opposite side of the first mold 112, thereby suppressing variation in the length of the crimp terminal 1.
Further, the material of the core wire 51 of the electric wire 50 is not limited to aluminum. The core wire 51 may be copper, a copper alloy, other conductive metal, or the like. The material of the crimp terminal 1 is not limited to copper or copper alloy, and may be other conductive metal or the like.
The position and shape of the tapered portion 12G of embodiment 2 are not limited to the illustrated positions and shapes, for example, a portion in which the terminal height H3 does not vary may be provided on the rear side of the tapered portion 12G in the cross section shown in fig. 28, the tapered portion 12G may not be linear, for example, the tapered portion 12G may have a cross-sectional shape that curves toward the bottom portion 14 side or a shape that curves toward the opposite side of the bottom portion 14 side, and the tapered portion 12G may be bent at the middle of the first direction L, for example, the tapered portion 12G may have a cross-sectional shape that is V-shaped.
[ 1 st modification of embodiment ]
A modification 1 of the embodiment will be described. Fig. 29 is a front view of a second mold according to a1 st modification of the embodiment; fig. 30 is a sectional view of a second mold according to a modification 1 of the embodiment; fig. 31 is a diagram illustrating an operation at the time of pressure bonding. FIG. 30 shows the XXX-XXX cross-section of FIG. 29. The second mold 113 according to modification 1 is different from the second mold 113 according to the above embodiment in that the tip ends of the first wall surface 115 and the second wall surface 116 have curved shapes.
The second mold 113 according to modification 1 suppresses chipping of the coupling portion 13.
As shown in fig. 29 and 30, bent portions 115a, 116a are provided at the front ends of the first wall surface 115 and the second wall surface 116, respectively, the bent portions 115a, 116a are continuous with a front surface 113F of the second mold 113, the front surface 113F is an end surface of the second mold 113 on the first compressor 113A side, the tangential direction of one ends 115b, 116b of the bent portions 115a, 116a is a first direction L, the tangential direction of the other ends 115c, 116c of the bent portions 115a, 115b is a second direction w, that is, the bent portions 115a, 115b are formed so as not to generate edges at both ends.
As shown in fig. 31, in the pressure bonding step, the first wall surface 115 presses the first barrel portion 15 toward the second barrel portion 16, and the second wall surface 116 presses the second barrel portion 16 toward the first barrel portion 15. Here, the first wall surface 115 and the second wall surface 116 of modification 1 have bent portions 115a and 116a, respectively. Even if the bent portions 115a and 116a contact the side wall 13a of the coupling portion 13, the side wall 13a is less likely to be damaged. Therefore, the second mold 113 according to modification 1 can suppress a decrease in the strength of the connecting portion 13.
In contrast to this, the second mold 113 of modification 1 has the bent portions 115a and 116a, the second mold 113 of modification 1 is provided with the bent portions 115a and 116a, and the width Wd1 is increased, and the damage to the side wall 13a is suppressed, and the length L1 of the coupling portion 13 is shortened, because the larger the width Wd1 of the terminal connecting portion 11 is, the more easily the tip of the second mold 113 damages the side wall 13a, and the shorter the length L1 of the coupling portion 13 is, the more easily the tip of the second mold 113 damages the side wall 13 a.
[ 2 nd modification of embodiment ]
A modification 2 of the embodiment will be described. The waterproof member 20 may not be exposed from the wire connection portion 12 after crimping. The waterproof member 20 may not be exposed from the wire connection portion 12 if it covers the tip of the core wire 51 and appropriately seals between the core wire 51 and the wire connection portion 12.
The shape of the enlarged diameter portion 113C is not limited to the illustrated shape. For example, the expanded diameter portion 113C may be formed so as to be recessed by the concave portion 113A as it goes toward the distal end side of the core wire 511And the cross-sectional area of the space surrounded by the first mold 112 gradually increases. On the contrary, the expanded diameter portion 113C may be formed to be recessed 113A toward the distal end side of the core wire 511And the cross-sectional area of the space surrounded by the first mold 112 is gradually reduced.
In addition, in the enlarged diameter portion 113C, a multi-step portion 117A may be provided on the third wall surface 117. In this case, it is preferable that concave portion 113A1The sectional area of the space surrounded by the first mold 112 increases stepwise along the first direction L the shape of the step 117A in the front view is not limited to the circular arc shape the shape of the step 117A may be, for example, a polygon.
The contents disclosed in the above embodiments and modifications can be implemented in appropriate combinations.

Claims (5)

1. An electric wire with a terminal, comprising:
an electric wire;
a crimp terminal having a wire connecting portion wound and crimped with respect to a core wire and a sheath of the wire,
an expanded diameter portion is provided at an end portion of the wire connecting portion on a distal end side of the core wire,
the cross-sectional area of the wire connecting portion of the enlarged diameter portion is larger than the cross-sectional area of the wire connecting portion of a portion closer to the base end side of the core wire than the enlarged diameter portion,
wherein the diameter-enlarged portion covers a distal end portion of the core wire and accommodates a waterproof member that seals a gap between the core wire and the wire connecting portion,
the wire connecting portion includes: a bottom wall portion; a pair of rivet pieces respectively protruding from both ends of the bottom wall portion in the width direction,
the pair of rivet pieces has: a first rivet tab wound relative to the core wire and the sheath; a second rivet piece wound in an overlapping manner on the outer side of the first rivet piece,
in the diameter-enlarged portion, a tip end of the first rivet piece is separated from the bottom wall portion,
the diameter-expanded portion has a flat portion that faces the bottom wall portion in a height direction of the crimp terminal and an outer side surface that is parallel to a width direction of the bottom wall portion,
the outer side surface of the flat portion is parallel to the axial direction of the electric wire,
the diameter-expanding portion includes: a side wall portion extending in a height direction from the bottom wall portion toward the flat portion; a corner of a curved shape joining the flat portion and the side wall portion,
the bottom wall portion of the portion where the wire connecting portion is crimped with respect to the core wire has a recess portion recessed toward the core wire side,
the diameter-expanded portion is separated from the recess in the axial direction of the electric wire.
2. A method for manufacturing an electric wire with a terminal,
includes a crimping step of sandwiching the wire connecting portion of the crimp terminal and the wire between a first mold and a second mold having a concave portion, winding and crimping the wire connecting portion around a core wire and a sheath of the wire,
in the crimping step, the wire connecting portion and the wire are crimped by the second die, the second die having a diameter-expanded portion at an end portion of the concave portion on the distal end side of the core wire, the diameter-expanded portion of the second die having a flat surface portion facing the first die,
wherein the enlarged diameter portion of the second mold is used to form an enlarged diameter portion of the wire connecting portion at an end portion on a distal end side of the core wire, the enlarged diameter portion of the wire connecting portion covering a distal end portion of the core wire and accommodating a waterproof member that seals a gap between the core wire and the wire connecting portion,
the wire connecting portion includes: a bottom wall portion; a pair of rivet pieces respectively protruding from both ends of the bottom wall portion in the width direction,
the pair of rivet pieces has: a first rivet tab wound relative to the core wire and the sheath; a second rivet piece wound in an overlapping manner on the outer side of the first rivet piece,
a tip end of the first rivet piece is separated from the bottom wall portion at a diameter-enlarged portion of the wire connecting portion,
the expanded diameter portion of the wire connecting portion has a flat portion that faces the bottom wall portion in a height direction of the crimp terminal and an outer side surface that is parallel to a width direction of the bottom wall portion,
the outer side surface of the flat portion is parallel to the axial direction of the electric wire,
the expanded diameter portion of the wire connecting portion includes: a side wall portion extending in a height direction from the bottom wall portion toward the flat portion; a corner of a curved shape joining the flat portion and the side wall portion,
the bottom wall portion of the portion where the wire connecting portion is crimped with respect to the core wire has a recess portion recessed toward the core wire side,
the diameter-expanded portion of the wire connecting portion is separated from the recess in the axial direction of the wire.
3. A terminal crimping device, characterized by comprising:
a first mold supporting the wire connecting portion of the crimp terminal;
a second mold having a concave portion, sandwiching the wire connecting portion and the electric wire between the second mold and the first mold, and winding and pressure-bonding the wire connecting portion with respect to a core wire and a sheath of the electric wire,
an expanded diameter portion of the second mold is provided at an end portion of the concave portion on a distal end side of the core wire,
a cross-sectional area of a space surrounded by the concave portion and the first mold is larger in the enlarged diameter portion of the second mold than in a portion closer to the base end side of the core wire than in the enlarged diameter portion of the second mold,
wherein the enlarged diameter portion of the second mold is used to form an enlarged diameter portion of the wire connecting portion at an end portion on a distal end side of the core wire, the enlarged diameter portion of the wire connecting portion covering a distal end portion of the core wire and accommodating a waterproof member that seals a gap between the core wire and the wire connecting portion,
the wire connecting portion includes: a bottom wall portion; a pair of rivet pieces respectively protruding from both ends of the bottom wall portion in the width direction,
the pair of rivet pieces has: a first rivet tab wound relative to the core wire and the sheath; a second rivet piece wound in an overlapping manner on the outer side of the first rivet piece,
a tip end of the first rivet piece is separated from the bottom wall portion at a diameter-enlarged portion of the wire connecting portion,
the expanded diameter portion of the wire connecting portion has a flat portion that faces the bottom wall portion in a height direction of the crimp terminal and an outer side surface that is parallel to a width direction of the bottom wall portion,
the outer side surface of the flat portion is parallel to the axial direction of the electric wire,
the expanded diameter portion of the wire connecting portion includes: a side wall portion extending in a height direction from the bottom wall portion toward the flat portion; a corner of a curved shape joining the flat portion and the side wall portion,
the bottom wall portion of the portion where the wire connecting portion is crimped with respect to the core wire has a recess portion recessed toward the core wire side,
the diameter-expanded portion of the wire connecting portion is separated from the recess in the axial direction of the wire.
4. The terminal crimping device as claimed in claim 3,
the recessed portion is recessed toward the opposite side of the first mold as compared with a portion on the base end side of the core wire in the enlarged diameter portion of the second mold.
5. The terminal crimping device as claimed in claim 3 or 4,
the diameter-expanded portion of the second die has a flat surface portion facing the first die.
CN201710943302.6A 2016-10-13 2017-10-11 Terminal-equipped electric wire, method for manufacturing terminal-equipped electric wire, and terminal crimping device Active CN107946782B (en)

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JP2016201871 2016-10-13
JP2017135454A JP6546627B2 (en) 2016-10-13 2017-07-11 Electric wire with terminal, manufacturing method of electric wire with terminal, and terminal crimping device
JP2017-135454 2017-07-11

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DE102017218236B4 (en) 2022-12-08
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US20180109009A1 (en) 2018-04-19
DE102017218236A1 (en) 2018-04-19

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